Performance investigation of IOT based pilot scale anaerobic digestion of food waste | |
| Author | Safi, Masihullah |
| Call Number | AIT Thesis no.EV-18-16 |
| Subject(s) | Sewage--Purification--Anaerobic treatment Food--Wast disposal |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-18-16 |
| Abstract | The pilot scale decentralized Continuously Stirred Tank Reactor (CSTR) was designed, developed and installed, with 675 L working volume, to treat food waste generated from the AIT campus community. The reactor was operated in mesophilic, anaerobic and wet condition with feedstock as food waste of 10 % Total Solids (TS) content. One of the main objectives of this research is to develop a remote monitoring system suitable for centralized monitoring of decentralized anaerobic digestion plants. The performance of the reactor was remotely monitored with the installation of three main sensors into the anaerobic digester viz., pH, Temperature and Oxidation Reduction Potential (ORP) sensors. All the sensors were connected through the Programmable Logic Controller (PLC) for compute rized monitoring. Other than the reactor monitoring, the quality of biogas was also monitored by online biogas analyzer system which measures the composition of the biogas. This system analyzes components such as Met hane (CH 4 ) content and Carbon dioxide (C O 2 ) present in the biogas. Internet of thing ( IoT ) enables all these data being monitored real time and aids the centralized operator informed of the performance of the reactor and the quality of the biogas produced, to make decisions on operation and maintenance of the system. Loading rates were arrived in terms of the quantity of Volatile Solids (VS) in food waste fed to the reactor. The CSTR was operated with three different Organic Loading Rates (O LR) viz., 1, 2 and 3 Kg VS/m 3 .d to evaluate the pe rformance of the food waste digestion and the biogas production. The average biogas yield and methane yield reduced with increasing organic loading rate. Methane yield of 0.42, 0.33 and 0.27 m 3 /kg.VS was achieved at organic loading rate s of 1, 2 and 3 kg.V s/m 3. While the methane content in biogas for organic loading rate s 1 and 2 was between 55 - 60% it was lower than 52% for organic loading 3 kg.VS/m 3. VS reduction of 78.3, 72 and 67% was achieved at organic loading rates 1, 2 and 33 kg.VS/m 3 respectively with TS reduction of 70.7 %, 66.5 % and 54.98 % |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-18-16 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Visvanathan, C.; |
| Examination Committee(s) | Shipin, Oleg V.;Salam, Abdul P.; |
| Scholarship Donor(s) | Ministry of Higher Education (MoHE), Afghanistan;AIT Fellowship; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2018 |